diff --git a/js/stickynav.js b/js/stickynav.js
index 553950d..7975ed5 100644
--- a/js/stickynav.js
+++ b/js/stickynav.js
@@ -11,7 +11,7 @@ jQuery(document).ready(function( $ ) {
 			if($('#wpadminbar').length > 0) adminHeight = $('#wpadminbar').outerHeight();
 			elem.attr('data-top', Math.round(parseFloat(offset.top - adminHeight)));
 		}
-		if ($(window).width() >= 768 && Math.round(parseFloat(elem.attr('data-top'))) - elem.outerHeight() <= $(this).scrollTop() - $(elem).outerHeight()){
+		if (window.innerWidth >= 768 && Math.round(parseFloat(elem.attr('data-top'))) - elem.outerHeight() <= $(this).scrollTop() - $(elem).outerHeight()){
 			elem.addClass('navbar-fixed-top');
 			elem.css('padding-top',$('#wpadminbar').outerHeight());
 		}
@@ -27,7 +27,7 @@ jQuery(document).ready(function( $ ) {
 		$('#masthead').children().each(function(){mastheadHeight += $(this).height();});
 		$('#masthead').css('height',mastheadHeight+'px');
 		var elem = $('#nav-wrapper');
-		if ($(window).width() >= 768 && !elem.hasClass('navbar-fixed-top')){
+		if (window.innerWidth >= 768 && !elem.hasClass('navbar-fixed-top')){
 			var offset = elem.offset();
 			var adminHeight = 0;
 			if($('#wpadminbar').length > 0) adminHeight = $('#wpadminbar').outerHeight();